<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<style>
    .df {
        display: flex;
    }
    .dif {
        display: inline-flex;
    }
    .d1 {
        width: 100px;
        border: 1px solid red;
    }

    .d2 {
        width: 200px;
        border: 1px solid blue;
    }
    .d3 {
        width: 200px;
        border: 1px solid green;
    }
</style>

<body>
    <script>
        function Fn() {
            console.log('Fn')
        }
        console.log('Fn:', Fn)
        console.log('Fn.__proto__:', Fn.__proto__)
        console.log('qwe-3', Fn.__proto__ === Function.prototype)
        console.log('qwe-4', Function.__proto__ === Function.prototype)
        console.log('qwe-4', Object.__proto__ === Function.prototype)
    </script>
    <div class="df">
        <div class="d1">d1</div>
        <div class="d2">d2</div>
    </div>
    <div class="dif">
        <div class="d1">d1</div>
        <div class="d3">d3</div>
    </div>

</body>

</html>